Chemistry · Periodic Classification of Elements
There are four elements P, Q, R, and S, and their atomic numbers are 2, 6, 13, and 18, respectively. Which of the following pairs has elements with similar valency?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1P and Q
- 2P and S✓
- 3R and S
- 4Q and S
Correct answer
P and S
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